631
FZUS52 KTBW 210631
CWFTBW

Coastal Waters Forecast for Florida
National Weather Service Tampa Bay Ruskin FL
231 AM EDT Thu Aug 21 2025

Gulf coastal waters from Bonita Beach to the mouth of the
Suwannee River out to 60 NM.

Important notice to mariners...marine forecasts are issued at
least four times a day. Boaters on extended trips should
routinely monitor subsequent forecast issuances and updates for
the latest marine weather information.

The wave heights are forecast as significant wave height which is
the average of the highest one-third of the waves. The highest
waves may rarely be twice the significant wave height. The winds
and seas near thunderstorms may be higher than forecast.

GMZ800-211930-
Synopsis for the coastal waters from Bonita Beach to Suwannee River-
231 AM EDT Thu Aug 21 2025

.SYNOPSIS...

Persistent west-southwest winds less than 15 knots will continue
over the eastern gulf waters for the remainder of the week and
into the weekend. We will see an increase in showers and storms
over the coming days with showers and storms firing up over the
eastern gulf waters early morning and traversing eastward toward
the coast late morning and into the afternoon. Outside of
thunderstorms, winds and seas remain below headline criteria.

&&

$$

GMZ830-211930-
Tampa Bay waters-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds 5 to 10 knots, increasing to 10 to 15 knots
late. Bay and inland waters a moderate chop. Isolated
thunderstorms. Isolated showers early this morning, then
scattered showers late this morning and afternoon.
.TONIGHT...Southwest winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots, increasing to 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Numerous showers with isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay and inland
waters light chop. Isolated thunderstorms. Numerous showers,
mainly in the evening.
.SATURDAY...Southwest winds 5 to 10 knots, becoming west 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Numerous showers with isolated thunderstorms.
.SATURDAY NIGHT...Southwest winds 5 to 10 knots. Bay and inland
waters light chop. Isolated thunderstorms. Numerous showers,
mainly in the evening.
.SUNDAY...West winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Bay and inland waters a moderate chop. Numerous
showers with isolated thunderstorms.
.SUNDAY NIGHT...West winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Bay and inland waters a moderate chop.
Isolated thunderstorms. Numerous showers, mainly in the evening.
.MONDAY...West winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Bay and inland waters a moderate chop. Numerous
showers with isolated thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ836-211930-
Charlotte Harbor and Pine Island Sound-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds 5 to 10 knots, increasing to 10 to 15 knots
late. Bay and inland waters a moderate chop. Scattered showers
with isolated thunderstorms.
.TONIGHT...Southwest winds 5 to 10 knots. Bay and inland waters
light chop. Isolated thunderstorms. Scattered showers, mainly in
the evening.
.FRIDAY...Southwest winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Bay and inland
waters light chop. Scattered showers with isolated thunderstorms.
.SATURDAY...Southwest winds 5 to 10 knots, becoming west 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Scattered showers with isolated thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.SUNDAY...Southwest winds 5 to 10 knots, becoming west 10 to
15 knots in the afternoon. Bay and inland waters a moderate chop.
Numerous showers with isolated thunderstorms.
.SUNDAY NIGHT...West winds 10 to 15 knots, diminishing to 5 to
10 knots after midnight. Bay and inland waters a moderate chop.
Scattered showers with isolated thunderstorms.
.MONDAY...West winds 5 to 10 knots, increasing to 10 to 15 knots
in the afternoon. Bay and inland waters a moderate chop.
Scattered showers with isolated thunderstorms.

Winds and waves higher in and near thunderstorms.

$$

GMZ856-211930-
Coastal waters from Bonita Beach to Englewood FL out 20 NM-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. Bay and inland waters light
chop. Scattered showers with isolated thunderstorms.
.TONIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: West 1 foot at 4 seconds. Bay and inland
waters light chop. Scattered showers with isolated thunderstorms.
.SATURDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 4 seconds. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 4 seconds. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.SUNDAY...West winds 10 to 15 knots. Seas 1 foot or less, then
around 2 feet in the afternoon. Bay and inland waters a moderate
chop. Numerous showers with isolated thunderstorms.
.SUNDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Bay and inland waters a moderate chop. Scattered showers with
isolated thunderstorms.
.MONDAY...West winds around 10 knots. Seas around 2 feet. Bay and
inland waters light chop. Scattered showers with isolated
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ876-211930-
Waters from Bonita Beach to Englewood FL out 20 to 60 NM-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds around 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. Scattered showers with isolated
thunderstorms.
.TONIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 3 seconds. Scattered showers with
isolated thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Scattered showers
with isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: West 1 foot at 4 seconds. Scattered showers
with isolated thunderstorms.
.SATURDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 4 seconds. Scattered showers with
isolated thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: West 1 foot at 4 seconds. Scattered showers with
isolated thunderstorms.
.SUNDAY...West winds around 10 knots. Seas 1 foot or less, then
around 2 feet in the afternoon. Numerous showers with isolated
thunderstorms.
.SUNDAY NIGHT...West winds around 10 knots. Seas around 2 feet.
Scattered showers with isolated thunderstorms.
.MONDAY...West winds around 10 knots. Seas around 2 feet.
Numerous showers with isolated thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ853-211930-
Coastal waters from Englewood to Tarpon Springs FL out 20 NM-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. Bay and inland waters light
chop. Scattered showers with isolated thunderstorms.
.TONIGHT...Southwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.FRIDAY...Southwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland waters
light chop. Numerous showers with isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 4 seconds. Bay and inland
waters light chop. Scattered showers with isolated thunderstorms.
.SATURDAY...Southwest winds around 10 knots. Seas 1 foot or less,
then around 2 feet in the afternoon. Wave Detail: Southwest
1 foot at 4 seconds, becoming west 2 feet at 4 seconds. Bay and
inland waters light chop. Numerous showers with isolated
thunderstorms.
.SATURDAY NIGHT...West winds around 10 knots. Seas around 2 feet.
Wave Detail: West 2 feet at 4 seconds. Bay and inland waters
light chop. Numerous showers with isolated thunderstorms.
.SUNDAY...West winds 10 to 15 knots. Seas around 2 feet. Bay and
inland waters a moderate chop. Widespread showers with isolated
thunderstorms.
.SUNDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Bay and inland waters a moderate chop. Numerous showers with
isolated thunderstorms.
.MONDAY...West winds around 10 knots. Seas around 2 feet. Bay and
inland waters light chop. Numerous showers with isolated
thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ873-211930-
Waters from Englewood to Tarpon Springs FL out 20 to 60 NM-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 2 seconds. Scattered showers with isolated
thunderstorms.
.TONIGHT...Southwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Scattered showers
with isolated thunderstorms.
.FRIDAY...Southwest winds around 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 4 seconds. Numerous showers with
isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds around 10 knots. Seas 1 foot or
less, then around 2 feet after midnight. Wave Detail: Southwest
1 foot at 4 seconds. Numerous showers with isolated
thunderstorms.
.SATURDAY...Southwest winds around 10 knots. Seas around 2 feet.
Wave Detail: Southwest 1 foot at 4 seconds. Widespread showers
with isolated thunderstorms.
.SATURDAY NIGHT...West winds around 10 knots. Seas around 2 feet
in the evening, then 1 foot or less. Wave Detail: Southwest
1 foot at 4 seconds, becoming west 1 foot at 4 seconds. Numerous
showers with isolated thunderstorms.
.SUNDAY...West winds 10 to 15 knots. Seas around 2 feet.
Widespread showers with isolated thunderstorms.
.SUNDAY NIGHT...West winds 10 to 15 knots. Seas around 2 feet.
Numerous showers with isolated thunderstorms.
.MONDAY...West winds around 10 knots. Seas around 2 feet.
Numerous showers with isolated thunderstorms.

Winds and seas higher in and near thunderstorms.

$$

GMZ850-211930-
Coastal waters from Tarpon Springs to Suwannee River FL out 20 NM-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: West 1 foot at 3 seconds. Bay and inland waters light
chop. Scattered showers with isolated thunderstorms.
.TONIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 2 seconds. Bay and inland waters
light chop. Scattered showers with isolated thunderstorms.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland waters
light chop. Numerous showers with isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 3 seconds. Bay and inland
waters light chop. Numerous showers with isolated thunderstorms.
.SATURDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 4 seconds. Bay and inland waters
light chop. Numerous showers with isolated thunderstorms.
.SATURDAY NIGHT...West winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 4 seconds. Bay and inland waters
light chop. Numerous showers with isolated thunderstorms.
.SUNDAY...West winds 5 to 10 knots. Seas 1 foot or less. Bay and
inland waters light chop. Widespread showers with isolated
thunderstorms.
.SUNDAY NIGHT...West winds 5 to 10 knots. Seas around 2 feet. Bay
and inland waters light chop. Numerous showers with isolated
thunderstorms.
.MONDAY...West winds 5 to 10 knots. Seas 1 to 2 feet. Bay and
inland waters light chop. Isolated thunderstorms. Numerous
showers, mainly in the morning.

Winds and seas higher in and near thunderstorms.

$$

GMZ870-211930-
Waters from Tarpon Springs to Suwannee River FL out 20 to 60 NM-
231 AM EDT Thu Aug 21 2025

.TODAY...West winds 5 to 10 knots. Seas 1 foot or less. Wave
Detail: Northwest 1 foot at 3 seconds. Scattered showers with
isolated thunderstorms.
.TONIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 2 seconds. Isolated
thunderstorms. Scattered showers in the evening, then numerous
showers after midnight.
.FRIDAY...Southwest winds 5 to 10 knots. Seas 1 foot or less.
Wave Detail: Southwest 1 foot at 3 seconds. Widespread showers
with isolated thunderstorms.
.FRIDAY NIGHT...Southwest winds 5 to 10 knots. Seas 1 foot or
less, then around 2 feet after midnight. Wave Detail: Southwest
1 foot at 4 seconds. Numerous showers with isolated
thunderstorms.
.SATURDAY...West winds 5 to 10 knots. Seas around 2 feet in the
morning, then 1 foot or less. Wave Detail: Southwest 1 foot at
4 seconds. Widespread showers with isolated thunderstorms.
.SATURDAY NIGHT...West winds around 10 knots. Seas 1 foot or
less. Wave Detail: Southwest 1 foot at 4 seconds. Isolated
thunderstorms. Widespread showers.
.SUNDAY...West winds around 10 knots. Seas 1 foot or less, then
around 2 feet in the afternoon. Widespread showers with isolated
thunderstorms.
.SUNDAY NIGHT...West winds around 10 knots. Seas around 2 feet.
Numerous showers with isolated thunderstorms.
.MONDAY...West winds 5 to 10 knots. Seas around 2 feet. Numerous
showers with isolated thunderstorms.

Winds and seas higher in and near thunderstorms.

$$